of its type in michigan . it was built between 1909 and 1910 because the twin falls power dam would flood an existing river crossing . the span cost $ 5 @ , @ 106 ( equivalent to $ 780 @ , @ 000 in 2015 ) , paid equally by dickinson and florence counties . until the 1930s , the upper twin falls bridge carried us 2 across the men ##omi ##nee river . in 1934 , a new bridge was built about a mile downstream , and the highway was re ##routed over the new span . the bridge closed to automobile traffic in september 1971 , and the nomination process for inclusion on the national register of historic places began in 2012 . in 2003
of its type in michigan. it was built between 1909 and 1910 because the twin falls power dam would flood an existing river crossing. the span cost $ 5 @, @ 106 ( equivalent to $ 780 @, @ 000 in 2015 ), paid equally by dickinson and florence counties. until the 1930s, the upper twin falls bridge carried us 2 across the menominee river. in 1934, a new bridge was built about a mile downstream, and the highway was rerouted over the new span. the bridge closed to automobile traffic in september 1971, and the nomination process for inclusion on the national register of historic places began in 2012. in 2003